Kirill is the Slavic form of Cyril, from Greek Kyrillos, meaning "lordly" or "masterful."
Kirill is the Russian and Eastern Slavic form of Cyril, derived from the Greek Kyrillos, which is thought to trace back to kyrios, meaning "lord" or "master," though some scholars link it to the Persian Kurush (Cyrus), meaning "sun" or "throne." The name is inseparable from one of the most consequential figures in European cultural history: Saint Cyril, the ninth-century Byzantine scholar-monk born Konstantinos who, together with his brother Methodios, created the Glagolitic alphabet to translate the Bible and liturgy into Old Church Slavonic. Though it was his followers who later developed the Cyrillic alphabet and named it in his honor, Saint Cyril's original mission of bringing literacy and scripture to the Slavic peoples reshaped the cultural and religious history of Eastern Europe.
The name Kirill carries this extraordinary intellectual and ecclesiastical heritage. Every time the Cyrillic script is used — in Russian, Bulgarian, Serbian, Mongolian, or any of the dozens of languages written in that alphabet — it is a kind of memorial to the monk whose name became Kirill in the Slavic languages he devoted his life to serving. In Russia, the name has remained in dignified but not overwhelming use for centuries, held close by Orthodox Christian families for whom Saint Cyril is a patron saint of learning and mission.
In the twenty-first century, Kirill gained international visibility through Patriarch Kirill of Moscow, head of the Russian Orthodox Church since 2009. Among Russian and Eastern European diaspora families, the name carries both religious gravitas and a distinctly Slavic cultural identity that sets it apart in Western naming landscapes. Its double-L ending gives it a satisfying finality, and it transliterates cleanly enough to function across linguistic borders while remaining unmistakably, proudly Slavic.